Heat recovery device



FIG. 1 is a top, right, front isometric view of a first embodiment of the heat recovery device;

FIG. 2 is a top, left, rear isometric view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and

FIG. 8 is a bottom view.

FIG. 9 is a top, right, front isometric view of a second embodiment of the heat recovery device;

FIG. 10 is a top, left, rear isometric view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a rear view thereof;

FIG. 13 is a right side view thereof;

FIG. 14 is a left side view thereof;

FIG. 15 is a top view thereof; and,

FIG. 16 is a bottom view.

The broken dash lines shown in the drawing views represent non-claimed subject matter, and neither the lines themselves nor anything within the lines form any part of the claimed invention. 

CLAIM The ornamental design for a heat recovery device, as shown and described. 